نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه تربیت بدنی وعلوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران
2 استادیار بیومکانیک ورزشی، گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل
3 استاد تمام فیزیولوژی ورزشی، گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران
4 گروه تربیت بدنی و علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Aim: Genu valgus malalignment is associated with altered lower limb muscular activities during running. The aim of the present study was to evaluate the effect of using brace in three different knee flexion angles on frequency of muscular activity during running in individuals with genu varus.
Materials and Methods: The statistical sample of this study consisted of 30 soccer students. 15 healthy individuals and 15 individuals with genu varus were selected to participate in this study. In the present study, the electrical activity of the muscles including medial gastrocnemius, tibialis anterior, vastus medialis, rectus femoris, vastus lateralis, biceps femoris, and semitendinosus were recorded by electromyography system during running with four brace conditions (without brace, knee brace at 15, 30, and 60 degree knee flexion).
Results: The results showed that the main effect of “brace” on frequency spectrum of biceps femoris during the loading phase was increased statistically. The greatest median frequency of biceps femoris during the loading phase was during running with brace with 30 degree knee flexion. The main effect of “brace” on frequency spectrum of semitendinosus during the push-off phase was statistically significant. The lowest value of semitendinosus muscle was during running with brace with 15 degree knee flexion.
Conclusion: The greatest effect of knee flexor brace is on frequency content of biceps femoris and semitendinosus muscles with brace at 30 degree knee flexion. This may be due to the passive support role of brace and possibly could prevent biceps femoris and semitendinosus injuries.
کلیدواژه‌ها [English]
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